S.D. Codified Laws § 5-5-10.2

It shall be the duty of the commissioner of school and public lands, as rapidly as practicable, to cause the grazing lands administered by the state to be appraised as to their annual animal carrying capacity, and to make and preserve a record thereof in his office, and at least every ten years cause said lands to be reexamined as to their annual animal carrying capacity so as to keep the records thereof in his office reasonably accurate.